|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Magnesium Technology 2017
||Enhanced Mechanical Properties of Extruded Mg-9mass%Al-1mass%Zn-2mass%Ca Alloy
||Xinsheng Huang, Yasumasa Chino, Hironori Ueda, Masashi Inoue, Futoshi Kido, Toshiharu Matsumoto
|On-Site Speaker (Planned)
In order to investigate the relationships between microstructure and mechanical properties of extruded Mg-9mass%Al-1mass%Zn-2mass%Ca (AZX912) alloy, the AZX912 alloy ingots with and without solution treatment were extruded at different temperatures in a range of 523-673 K. With decreasing extrusion temperature, the grain size of dynamically recrystallized grains decreased, and the amount of fine Mg<SUB>17</SUB>Al<SUB>12</SUB> precipitates increased due to dynamic precipitation. All extruded AZX912 alloys exhibited basal texture with basal planes roughly parallel to the extrusion direction and the large spread of (0002) orientation in the radial direction of extruded bar. The basal texture intensities remarkably increased with increasing extrusion temperature. Nanoscale Mg<SUB>17</SUB>Al<SUB>12</SUB> precipitates enhance mechanical strength significantly but deteriorate ductility. The bar extruded at 523 K exhibited the highest mechanical strength due to the combined effect of the remarkably refined grain structure and the large amount of nanoscale Mg<SUB>17</SUB>Al<SUB>12</SUB> precipitates.